Chemical Engineering MCQs

Page No. 140

Pick out the wrong statement ?


a At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature


bNormally, the gases which are easily liquefied are more soluble in common solvents


cThe gases which are capable of forming ions in aqueous solution are much more soluble in water than in other solvents


dAt constant pressure, solubility of a gas in a liquid increases with rise in temperature



Maximum carbon content in cast iron is ______________ percent?


a3.8


b5.2


c4.8


d4.3


View Answer 4.3

In a homogeneous solution, the activity co-efficient of a component depends upon the_________________?


aPressure


bComposition


cTemperature


dAll (A), B. and (C)


View Answer All (A), B. and (C)

Cast iron is__________________?


aUsed for making shock resisting parts


bManufactured in cupola and is brittle


cHaving compressive strength more than its tensile strength


dAll A., B. & C.


View Answer All A., B. & C.

The main feature of Carnot refrigeration cycle is that, it________________________?


aDoes not need the addition of external work for its functioning


bTransfers heat from high temperature to low temperature


cAccomplishes the reverse effect of the heat engine


dNone of these



Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with______________?


aAcidic refractory


bRubber


cKarbate


dLead or acid proof bricks


View Answer Acidic refractory

Manganese in steel affects its__________________?


aDuctility


bTensile strength


cHardness


dNone of these


View Answer Ductility

High carbon steel contains more than _____________ percent carbon?


a0.5


b2.2


c2.5


d2.8


View Answer 0.5

Which of the following processes cannot be made reversible even under ideal condition of operation ?


aFree expansion of a gas


b Compression of air in a compressor


cExpansion of steam in a turbine


dAll (A), B. & (C)



Which of the following has no effect on the carbide forming tendency in steels ?


aMolybdenum


bPhosphorus


cChromium


dVanadium


View Answer Phosphorus

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